Automatic calibration of drop-on-demand ink jet ejector

Details Automatic calibration of drop-on-demand ink jet ejector Automatic calibration of drop-on-demand ink jet ejector

1983-03-28

1985-04-02

Hartary, Joseph W.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

346140R, G01D 1800

Patent

active

045090572

ABSTRACT:
A method of calibrating a scanning carriage drop-on-demand ink jet ejector wherein the ejector is traversed past a droplet detection light beam while droplets are ejected. By knowing the position of the ejector and relating it to the amount of light blocked by droplets, horizontal errors in drop position can be detected. Similarly, by measuring the amount of time elapsing between droplet ejection and droplet detection, the velocity of the droplets can be determined. Corrections can be made by adjusting the time of ejection and/or the drive pulse amplitude and/or width.

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patent: 4323908 (1982-04-01), Lee
Fan, G. J.; Phase Detection of the Ink Jet Droplets; IBM TDB, vol. 16, No. 3, Aug. 1973, p. 880.

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